RIDGID's Screw Feed Tubing Cutters make clean square cuts on copper, brass, aluminum and thin-wall steel. X-CEL® Knob cuts tubing more quickly and easily with a larger, more ergonomic designs. The RIDGID Model 30 Screw Feed Tubing Cutter is designed to make clean and smooth cuts on 1 (25.4 mm) to 3-1/8" (3.175 mm)-inch diameter stainless steel.